Primusrun command not working

[Vor -neu-]

Hi, I have a laptop using Nvidia Optimus. To get more performance I tried to install Bumblebee on my SteamOS laptop. I'm using Debian wiki as a guide. After installing I tried to run primusrun glxspheres command to see if it's working and I get a message like this.
/usr/bin/primusrun: line 52: exec: glxspheres: not found
I also tried to run the game on steam using primusrun %command% on launch options and the game won't load. After loading for a while the screen is back to steam big picture mode again. Could someone please help me. Sorry for my bad english.

Here's something to take a note:
1. I'm using Bumblebee for Nvidia's open source driver since I couldnt install it for Nvidia's proprietary driver.
2. I tried to install Nvidia driver on steamos using this link https://steamcommunity.com/groups/steamuniverse/discussions/1/540743757298243719/. the installation work fine, however when I reboot I got a fatal error screen.

[ProfessorKaos64]

Valve already includes nvidia drivers by default. I'll take a look at the wiki in a few hours.

[Erbabudojo]

Im using steamOs with optimus grafic-card and have no problems running games with primusrun %command% - so how did i get here - i have brewmaster and added all debian jessie repositorys see https://wiki.debian.org/Bumblebee - to install debian packages use -> apt-get install -t jessie
hope i could help you :)